San Diego County, San Diego Rat Control Situation:
Hi David, Is a UV blacklight still useful, exterior-wise, if it rains after the rodents leave their urine stains? I am in the process of performing exterior maintenance to better exclude my roof rats. 1) I have a 25 year old cedar shake roof in San Diego California with openings under each shake along the rake edge of the roof at the gable ends of my house. There's no drip edge, i.e. under the shakes I have roofing paper (now somewhat curled) that runs more or less up to and rests right atop the fascia board. Because I have skip sheathing, and since the cross section of a shake is a wedge that is up to one inch at the upper, thick end, this appears to create many huge entry points along the rake edges even though the sheathing is rabbeted into the fascia board. As a result, I'm thinking of getting a UV blacklight to use outside the house to sleuth for urine stains along the upper edge of the gable end shakes and fascia boards. My question is, how easily does the winter rain wash away the urine, rendering this a pointless exercise? 2) I noticed a new product called "rat-out gel" and was thinking of applying it along the rake edges mentioned above. Or, maybe I should just buy many rolls of X-Clude and use that instead. Or maybe both. Any comment? Thanks very much for your website, Doug
My response: First off, I do not have experience using UV lights to detect rat urine. But I do suspect that rain will severely limit the effectiveness of this approach. I have never heard of Rat-Out Gel or XClude, but I typically stick to physical barriers rather than repellent type devices. If your roof makes this impossible, you might have a tough time keeping the rats out.
San Diego Rat Control Tip of The Week
Can Rats Chew Through The Ceiling?
Rats Are Adept At Climbing:
Rats can fit through surprisingly small spaces and they are extremely adept climbers, it may not take long for a rat to make its way up to the ceiling and then to continue burrowing through the ceiling in an effort to make a nest.
Rats Have Powerful Teeth:
Rats have the ability to chew through almost anything. Certain varieties of brown rats are able to bite through cinderblocks and light concrete. Rather than facing rats that could potentially wreck your ceiling, it's wise to stop them before they have a chance to cause structural damage.
Rats Often Spend Time In Attics:
Rats like to spend time in attics because it can often give them quick access to the outside world. Chewing through the ceiling is a likely consideration because rats are likely to be spending time at the top of your home. Rats like to hide out in attics where they may not be disturbed and this will regularly lead to the chance that a rat could chew through your ceiling quite quickly.
Rats Make Short Work Of Items Like Drywall:
Because the majority of ceilings are made out of drywall and plaster, a rat can chew through these areas quite quickly. You could have a rat making its way through your ceiling tiles within just a matter of minutes and this can be potentially dangerous for the structural integrity of your home.
Rats Want To Be Where It's Warm:
It's likely that a rat will always be directed towards the ceiling as they want to be in an area where it's warm to raise their young. Because rats can breed so quickly and because they are likely to need access to a warm roof spot, you may find rats naturally gnawing through your ceiling.
